src: add public API to expose the main V8 Platform

helloshuangzi · addaleax · commit b00c34c16155 · 2018-05-06T23:34:09.000+02:00
Add an API to get MultiIsolatePlatform used in node main thread. PR-URL: nodejs#20447 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
diff --git a/src/node.cc b/src/node.cc
@@ -4425,6 +4425,11 @@ void FreeEnvironment(Environment* env) {
 }
 
 
+MultiIsolatePlatform* GetMainThreadMultiIsolatePlatform() {
+  return v8_platform.Platform();
+}
+
+
 MultiIsolatePlatform* CreatePlatform(
     int thread_pool_size,
     v8::TracingController* tracing_controller) {
diff --git a/src/node.h b/src/node.h
@@ -251,6 +251,11 @@ NODE_EXTERN Environment* CreateEnvironment(IsolateData* isolate_data,
 NODE_EXTERN void LoadEnvironment(Environment* env);
 NODE_EXTERN void FreeEnvironment(Environment* env);
 
+// This returns the MultiIsolatePlatform used in the main thread of Node.js.
+// If NODE_USE_V8_PLATFORM haven't been defined when Node.js was built,
+// it returns nullptr.
+NODE_EXTERN MultiIsolatePlatform* GetMainThreadMultiIsolatePlatform();
+
 NODE_EXTERN MultiIsolatePlatform* CreatePlatform(
     int thread_pool_size,
     v8::TracingController* tracing_controller);
